Analysis

  • max time kernel
    143s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-05-2024 04:46

General

  • Target

    2024-05-03_b99bf6956a34496b750f3ca00672e7de_cryptolocker.exe

  • Size

    54KB

  • MD5

    b99bf6956a34496b750f3ca00672e7de

  • SHA1

    c84e2bddda1407c18346a7c8e8c10d098aceaf8d

  • SHA256

    4752db76a06d8f728354a190b30422aadf2a9ce5f8bcce873703fd38cb41fe48

  • SHA512

    17902454e535584ff51f66533947ea2817f080ce87d302aca053c98aeb6c3ec2c14446ea53be8076726d335d1f69e50167b1edbc1f683c3c4485870822037ed4

  • SSDEEP

    1536:ZzFbxmLPWQMOtEvwDpj386Sj/WprgJN6tZdO5Uom:ZVxkGOtEvwDpjcA

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-03_b99bf6956a34496b750f3ca00672e7de_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-03_b99bf6956a34496b750f3ca00672e7de_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3404
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:3092
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4092 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:3740

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\misid.exe

      Filesize

      54KB

      MD5

      7125c6787db2f15999588fd156add751

      SHA1

      e0712c3891bf62945c73ae6cbebf8c1d29c4b205

      SHA256

      3afd50dce5f4906369d90e78085cf63ce07513a8e14e033abb1c65e2f1348bf6

      SHA512

      742e7aaad03d0303a8e9486da62779b3468f68fd5dc333cc82faabb491aad93c4aa388d027d4eccffc586d163e6d795bfb6e2d207f3a1758915b1b2b22c7d752

    • C:\Users\Admin\AppData\Local\Temp\misids.exe

      Filesize

      315B

      MD5

      a34ac19f4afae63adc5d2f7bc970c07f

      SHA1

      a82190fc530c265aa40a045c21770d967f4767b8

      SHA256

      d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

      SHA512

      42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

    • memory/3092-25-0x0000000000620000-0x0000000000626000-memory.dmp

      Filesize

      24KB

    • memory/3092-19-0x0000000000750000-0x0000000000756000-memory.dmp

      Filesize

      24KB

    • memory/3092-17-0x00000000004E0000-0x00000000004E3000-memory.dmp

      Filesize

      12KB

    • memory/3404-0-0x00000000004E0000-0x00000000004E3000-memory.dmp

      Filesize

      12KB

    • memory/3404-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/3404-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

      Filesize

      24KB

    • memory/3404-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

      Filesize

      24KB

    • memory/3404-26-0x00000000004E0000-0x00000000004E3000-memory.dmp

      Filesize

      12KB